Don't know about you, but my heart needs a charge every six hours and it goes in hibernation mode every 12 hours.

Can I upgrade to yours? :-)

If your heart stops beating for 12 hours, maybe you need to talk to your doctor.

I'm pretty sure you have to eat every so often for your heart to keep on working...

Pretty amazing that it was a result of a lucky mutation. I wonder what happened to the millions (billions?) of organisms that couldn't maintain a steady heartbeat?

They had their lunch eaten by the heartbeaters, and when we were done eating their lunch, we ate them :)